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Finding the Fourth Proportional to 857.81, 1,183.85 and 526.44

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Solution

The fourth proportional to 857.81, 1,183.85 and 526.44 is: 726.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    857.81 : 1,183.85 = 526.44 : x
  2. Step 2: Convert to fraction form
    857.81/1,183.85 = 526.44/x
  3. Step 3: Cross multiply
    857.81x = 1,183.85 × 526.44
  4. Step 4: Simplify right side
    857.81x = 623,225.99
  5. Step 5: Solve for x
    x = 623,225.99/857.81
  6. Step 6: Final answer
    x = 726.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.